Page 24 - Initial Programming
Basic System Programming
Page 24 - Basic System Programming
Installation & Maintenance
INDeX 30
38DHB0002UKDF- Issue 4 (07/2001)
Configuring Basic Rate Interfaces
The INDeX 30 system defaults the first circuit to a T-interface (network) and any
remaining circuits to S-interfaces (user). Each B-channel (two per circuit) is allocated
an appropriate device address at the same time. The system automatically adds T-
Interface circuits to group 90 when allocating trunk numbers. You must manually
remove the numbers from group 90 if necessary.
If a circuit is changed from S to T or T to S, the system automatically de-allocates
the existing pair of trunk or terminal directory numbers and allocates two new
terminal or trunk directory numbers.
To configure Basic Rate circuits :
1. From the
Administration
menu, select
Channel Information
.
2. Select
Setup
.
3. Select the circuit you want to alter. Enter the circuit type or circuit type and circuit
type suffix separated by a
/
.
–
Circuit Types :
T
= T-Interface with connect detect (i.e.. power from the line). Use this setting for
INDeX 30 to ISDN2 exchange line connections in the UK.
X
= T-Interface with no connect detect (i.e.. no power from the line).
S
= S-Interface. Use this setting for INDeX 30 to ISDN terminal device
connections.
–
Circuit Type Suffix :
P
= Point to point connections (p-p). Use this setting for S-interface connections.
M
= Point to multipoint connection (p-m). Use this setting for T-interfaces in the
UK even though they must only be physically connected as point-to-point
connections.
Frame synchronisation
Frame synchronisation is used to allow the system's digital data stream to be
synchronised to the incoming BRI T interface clocks. The default is to enable Frame
synchronisation from Basic Rate T interfaces, and is correct when connecting to a
PTT.
To configured frame synchronisation:
1. From the
Administration
menu, select
System
2. Select
Frame Synchronisation
3. Select
Y
or
N
With
ISDN = yes
, frame synchronisation from BRI T interfaces is enabled. This is
the setting that should be used when connecting to a PTT or other BRI network
connections that have been agreed to be enabled as synchronisation masters.
With
ISDN = no
, frame synchronisation from BRI T interfaces is disabled. This
should be used when connecting to BRI network connections that cannot be used as
synchronisation masters (e.g. some piggy back installations).